<template>
    <div>
        <el-upload
            :action="uploadUrl"
            :before-upload="handleBeforeUpload"
            :on-success="handleUploadSuccess"
            :on-error="handleUploadError"
            name="file"
            :show-file-list="false"
            :headers="headers"
            style="display: none"
            ref="upload"
            v-if="this.type == 'url'"
        >
        </el-upload>
        <div class="editor" ref="editor" :style="styles"></div>
    </div>
</template>

<script>
import Quill from 'quill'
import 'quill/dist/quill.core.css'
import 'quill/dist/quill.snow.css'
import 'quill/dist/quill.bubble.css'
import { getToken } from '@/utils/auth'

export default {
    name: 'Editor',
    props: {
        /* 编辑器的内容 */
        value: {
            type: String,
            default: '',
        },
        /* 高度 */
        height: {
            type: Number,
            default: null,
        },
        /* 最小高度 */
        minHeight: {
            type: Number,
            default: null,
        },
        /* 只读 */
        readOnly: {
            type: Boolean,
            default: false,
        },
        /* 显示工具条 */
        showToolbar: {
            type: Boolean,
            default: true,
        },
        // 上传文件大小限制(MB)
        fileSize: {
            type: Number,
            default: 5,
        },
        /* 类型（base64格式、url格式） */
        type: {
            type: String,
            default: 'url',
        },
        /* 是否显示自定义的toolBar */
        isShowCustomToolBar: {
            type: Boolean,
            default: false,
        },

    },
    data() {
        return {
            // uploadUrl: process.env.VUE_APP_BASE_API + "/common/upload", // 上传的图片服务器地址
            uploadUrl: process.env.VUE_APP_BASE_API + '/system/user/profile/uploadActivity', // 上传的图片服务器地址
            headers: {
                Authorization: 'Bearer ' + getToken(),
            },
            Quill: null,
            currentValue: '',
            options: {
                theme: 'snow',
                bounds: document.body,
                debug: 'warn',
                modules: {
                    // 工具栏配置
                    // toolbar: [
                    //   ['bold', 'italic', 'underline', 'strike'], // 加粗 斜体 下划线 删除线
                    //   ['blockquote', 'code-block'], // 引用  代码块
                    //   [{ list: 'ordered' }, { list: 'bullet' }], // 有序、无序列表
                    //   [{ indent: '-1' }, { indent: '+1' }], // 缩进
                    //   [{ size: ['small', false, 'large', 'huge'] }], // 字体大小
                    //   [{ header: [1, 2, 3, 4, 5, 6, false] }], // 标题
                    //   [{ color: [] }, { background: [] }], // 字体颜色、字体背景颜色
                    //   [{ align: [] }], // 对齐方式
                    //   ['clean'], // 清除文本格式
                    //   ['image'], //图片
                    //   ['spaceBar'],//空格
                    // ],
                    toolbar:{
                        container:[
                            ['bold', 'italic', 'underline', 'strike'], // 加粗 斜体 下划线 删除线
                            ['blockquote', 'code-block'], // 引用  代码块
                            [{ list: 'ordered' }, { list: 'bullet' }], // 有序、无序列表
                            [{ indent: '-1' }, { indent: '+1' }], // 缩进
                            [{ size: ['small', false, 'large', 'huge'] }], // 字体大小
                            [{ header: [1, 2, 3, 4, 5, 6, false] }], // 标题
                            [{ color: [] }, { background: [] }], // 字体颜色、字体背景颜色
                            [{ align: [] }], // 对齐方式
                            ['clean'], // 清除文本格式
                            ['image'], //图片
                            ['spaceBar'],//空格
                            ['changeLine'],//换行
                        ],
                        handlers:{
                            'spaceBar':()=>{
                                this.handleSpaceBar()
                            },
                            'changeLine':()=>{
                                this.handleChangeLine()
                            }
                        }
                    }
                },
                placeholder: '请输入内容',
                readOnly: this.readOnly
            },
        }
    },
    computed: {
        styles() {
            let style = {}
            if (this.minHeight) {
                style.minHeight = `${this.minHeight}px`
            }
            if (this.height) {
                style.height = `${this.height}px`
            }
            return style
        },
    },
    watch: {
        value: {
            handler(val) {
                if (val !== this.currentValue) {
                    this.currentValue = val === null ? '' : val
                    if (this.Quill) {
                        this.Quill.pasteHTML(this.currentValue)
                    }
                }
            },
            immediate: true,
        },
    },
    mounted() {
        this.init();
        this.$bus.$on('addTag',(item)=>{
            let quill = this.Quill;
            let text = `[${item.itemValue}]`
            // 保存当前光标位置
            let range = quill.getSelection(true);
            quill.insertEmbed(range.index,'customTag',{text:text, id_key:item.placeholder});
            quill.focus()
            quill.update()

        })
    },

    beforeDestroy() {
        this.Quill = null;
        // 销毁对应自定义事件
        this.$bus.$off('addTag');
    },
    methods: {
        init() {
            const editor = this.$refs.editor
            if(!this.showToolbar){
                this.options.modules.toolbar=[]
            }
            if (this.readOnly){
                this.Quill = new Quill(editor, {modules:{toolbar:false}})
                this.Quill.enable(false);
            }else {
                this.Quill = new Quill(editor, this.options)
                this.Quill.enable(true);
            }

            // 如果设置了上传地址则自定义图片上传事件
            if (this.type == 'url') {
                let toolbar = this.Quill.getModule('toolbar')
                toolbar.addHandler('image', (value) => {
                    this.uploadType = 'image'
                    if (value) {
                        !this.readOnly && this.$refs.upload.$children[0].$refs.input.click()
                    } else {
                        this.quill.format('image', false)
                    }
                })
            }
            this.Quill.pasteHTML(this.currentValue)
            this.Quill.on('text-change', (delta, oldDelta, source) => {
                const html = this.$refs.editor.children[0].innerHTML
                const text = this.Quill.getText()
                const quill = this.Quill
                this.currentValue = html
                this.$emit('input', html)
                this.$emit('on-change', { html, text, quill })
            })
            this.Quill.on('text-change', (delta, oldDelta, source) => {
                this.$emit('on-text-change', delta, oldDelta, source)
            })
            this.Quill.on('selection-change', (range, oldRange, source) => {
                this.$emit('on-selection-change', range, oldRange, source)
            })
            this.Quill.on('editor-change', (eventName, ...args) => {
                this.$emit('on-editor-change', eventName, ...args)
            })

            this.onEditorReady();
            this.customSpanBlot();

        },
        onEditorReady() {
            document.querySelector('.ql-formats .ql-spaceBar').innerText = '空';
            document.querySelector('.ql-formats .ql-changeLine').innerText = '换';
        },
        // 点击了自定义的spaceBar
        handleSpaceBar(){
            let quill = this.Quill;
            let text = `[空格]`
            // 保存当前光标位置
            let range = quill.getSelection(true);
            quill.insertEmbed(range.index,'customTag',{text:text, id_key:'space'});
            quill.focus()
            quill.update()
        },
        handleChangeLine(){
            let quill = this.Quill;
            let text = `[换行]`
            // 保存当前光标位置
            let range = quill.getSelection(true);
            quill.insertEmbed(range.index,'customTag',{text:text, id_key:'changeLine'});
            quill.focus()
            quill.update()
        },

        // 上传前校检格式和大小
        handleBeforeUpload(file) {
            // 校检文件大小
            if (this.fileSize) {
                const isLt = file.size / 1024 / 1024 < this.fileSize
                if (!isLt) {
                    this.$message.error(`上传文件大小不能超过 ${this.fileSize} MB!`)
                    return false
                }
            }
            // const formdata = new FormData()
            // formdata.append('avatarfile', file)
            return true
        },

        handleUploadSuccess(res, file) {
            // 获取富文本组件实例
            let quill = this.Quill
            // 如果上传成功
            if (res.code == 200) {
                // 获取光标所在位置
                let length = quill.getSelection().index
                // 插入图片  res.url为服务器返回的图片地址
                quill.insertEmbed(
                    length,
                    'image',
                    this.getImgUrl(res.imgUrl)
                    // process.env.VUE_APP_BASE_API + res.fileName
                )
                // 调整光标到最后
                quill.setSelection(length + 1)
            } else {
                this.$message.error('图片插入失败')
            }
        },
        handleUploadError() {
            this.$message.error('图片插入失败')
        },

        // 自定义扩展插入
        customSpanBlot() {
            const Embed = Quill.import("blots/embed")
            class CustomSpanBlot extends Embed  {
                static create(value) {
                    let node = super.create();
                    console.log('node------', node);
                    node.innerHTML = value.text
                    node.setAttribute('id_key', value.id_key);
                    node.setAttribute('contenteditable', false);
                    node.setAttribute('class', 'tagSpan');
                    node.setAttribute('style', 'color:#FF1823;text-decoration: none;display: inline-block;font-style: normal;background-color: #fff;margin: 0 2px;');
                    return node;
                }
                static value(node) {
                    return {
                        id_key: node.getAttribute('id_key'),
                        text: node.innerHTML.trim()
                    };
                }
            }
            CustomSpanBlot.blotName = 'customTag';
            CustomSpanBlot.tagName = 'span';
            CustomSpanBlot.className = 'tagSpan';
            Quill.register(CustomSpanBlot);
        }

    },
}
</script>

<style>
.editor,
.ql-toolbar {
    white-space: pre-wrap !important;
    line-height: normal !important;
}
.quill-img {
    display: none;
}
.ql-snow .ql-tooltip[data-mode='link']::before {
    content: '请输入链接地址:';
}
.ql-snow .ql-tooltip.ql-editing a.ql-action::after {
    border-right: 0px;
    content: '保存';
    padding-right: 0px;
}

.ql-snow .ql-tooltip[data-mode='video']::before {
    content: '请输入视频地址:';
}

.ql-snow .ql-picker.ql-size .ql-picker-label::before,
.ql-snow .ql-picker.ql-size .ql-picker-item::before {
    content: '14px';
}
.ql-snow .ql-picker.ql-size .ql-picker-label[data-value='small']::before,
.ql-snow .ql-picker.ql-size .ql-picker-item[data-value='small']::before {
    content: '10px';
}
.ql-snow .ql-picker.ql-size .ql-picker-label[data-value='large']::before,
.ql-snow .ql-picker.ql-size .ql-picker-item[data-value='large']::before {
    content: '18px';
}
.ql-snow .ql-picker.ql-size .ql-picker-label[data-value='huge']::before,
.ql-snow .ql-picker.ql-size .ql-picker-item[data-value='huge']::before {
    content: '32px';
}

.ql-snow .ql-picker.ql-header .ql-picker-label::before,
.ql-snow .ql-picker.ql-header .ql-picker-item::before {
    content: '文本';
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value='1']::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value='1']::before {
    content: '标题1';
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value='2']::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value='2']::before {
    content: '标题2';
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value='3']::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value='3']::before {
    content: '标题3';
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value='4']::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value='4']::before {
    content: '标题4';
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value='5']::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value='5']::before {
    content: '标题5';
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value='6']::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value='6']::before {
    content: '标题6';
}

.ql-snow .ql-picker.ql-font .ql-picker-label::before,
.ql-snow .ql-picker.ql-font .ql-picker-item::before {
    content: '标准字体';
}
.ql-snow .ql-picker.ql-font .ql-picker-label[data-value='serif']::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value='serif']::before {
    content: '衬线字体';
}
.ql-snow .ql-picker.ql-font .ql-picker-label[data-value='monospace']::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value='monospace']::before {
    content: '等宽字体';
}


</style>
